Climate Comfort Score
80/100
Excellent
NOAA 1991–2020 normals 59°F annual avg Public-domain federal data
Redwood City, CA Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 59°F
- Avg annual temp
- 80/100
- Comfort score
- 19.0"
- Annual precip
- 329d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Redwood City
Redwood City, California averages 59°F a year and scores 80/100 on the comfort index - excellent, milder than 82% of U.S. cities.
- 59°F
- yearly average temperature, NOAA normal
- 80/100
- comfort score, milder than 82% of U.S. cities
- 19.0"
- annual precipitation
- 329 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
59°F (15°C)
Avg High
70°F
Avg Low
48°F
Annual Precip
19.0"
Annual Snow
0.0"
Comfort Score
80/100
Excellent
Avg Annual Temperature
59°F
30-year mean (NOAA NCEI)
Annual Precipitation
19.0"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Redwood City) 80.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Redwood City area.
How Redwood City compares to every U.S. city
Redwood City's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
80 Top 18% higher than 82% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Redwood City
MethodologyRedwood City's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 59°F (15°C) | 41°F (5°C) | 50°F (10°C) | 3.8" | 0.0" | 2.5 | 0.0 |
| February | 62°F (17°C) | 43°F (6°C) | 52°F (11°C) | 3.6" | 0.0" | 0.7 | 0.0 |
| March | 65°F (19°C) | 45°F (7°C) | 55°F (13°C) | 3.0" | 0.0" | 0.0 | 0.0 |
| April | 69°F (20°C) | 47°F (8°C) | 58°F (14°C) | 1.1" | 0.0" | 0.0 | 0.3 |
| May | 73°F (23°C) | 50°F (10°C) | 62°F (16°C) | 0.5" | 0.0" | 0.0 | 1.2 |
| June | 79°F (26°C) | 54°F (12°C) | 66°F (19°C) | 0.2" | 0.0" | 0.0 | 3.6 |
| July | 81°F (27°C) | 57°F (14°C) | 69°F (20°C) | 0.0" | 0.0" | 0.0 | 3.6 |
| August | 81°F (27°C) | 57°F (14°C) | 69°F (20°C) | 0.0" | 0.0" | 0.0 | 3.8 |
| September | 79°F (26°C) | 54°F (12°C) | 67°F (19°C) | 0.1" | 0.0" | 0.0 | 4.2 |
| October | 75°F (24°C) | 50°F (10°C) | 62°F (17°C) | 0.9" | 0.0" | 0.0 | 1.5 |
| November | 65°F (18°C) | 44°F (7°C) | 54°F (12°C) | 1.9" | 0.0" | 0.4 | 0.0 |
| December | 59°F (15°C) | 40°F (5°C) | 49°F (10°C) | 3.9" | 0.0" | 2.6 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.8"
9.3 days with precipitation
February 3.6"
9.1 days with precipitation
March 3.0"
9.4 days with precipitation
April 1.1"
4.9 days with precipitation
May 0.5"
2.9 days with precipitation
June 0.2"
0.9 days with precipitation
July 0.0"
0.0 days with precipitation
August 0.0"
0.2 days with precipitation
September 0.1"
0.5 days with precipitation
October 0.9"
2.5 days with precipitation
November 1.9"
6.3 days with precipitation
December 3.9"
9.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 12
50% probability date
Last Spring Freeze
January 17
50% probability date
Growing Season
329 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
2,519
Higher = more heating needed
Cooling Degree Days
475
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Redwood City's climate means for you
Redwood City runs 59°F a year - peaking in July, coldest in December.
- Gardeners get about 329 frost-free days, with the last spring freeze near January 17 - plan the planting calendar around it, not the regional average.
- Energy bills track 2,519 heating and 475 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Redwood City, CA
An annual average temperature of 59°F, ranging from a mean daily high of 70°F to a mean daily low of 48°F is what the NOAA 1991–2020 climate normals report for Redwood City, California. July is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00047339 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Redwood City averages 19.0 inches of precipitation a year, with negligible snowfall, and that matters as much to daily life here as temperature does. The frost-free season averages 329 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near January 17 and the first fall freeze near December 12. As for energy demand, 2,519 heating degree days and 475 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Redwood City scores 80/100 (Excellent), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings December-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Redwood City, CA? ▼
The average annual temperature in Redwood City, California is 59°F. The warmest month averages 81°F (27°C) and the coldest averages 40°F (5°C).
How much rain does Redwood City get? ▼
Redwood City receives 19.0 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Redwood City? ▼
Redwood City has a climate comfort score of 80/100 (Excellent), milder than 82% of U.S. cities in the PlainClimate database.
When is the growing season in Redwood City? ▼
Redwood City has approximately 329 frost-free days per year, with the last spring freeze around January 17 and the first fall freeze around December 12.
How much energy does heating and cooling require in Redwood City? ▼
Redwood City has 2,519 heating degree days and 475 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Redwood City climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00047339 near Redwood City.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00047339. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.